Added Explicit user book rating + Community rating

server/models/UserBookExplicitRating.js

@@ -0,0 +1,54 @@
+const { DataTypes, Model } = require('sequelize')
+
+class UserBookExplicitRating extends Model {
+  static init(sequelize) {
+    super.init(
+      {
+        id: {
+          type: DataTypes.INTEGER,
+          primaryKey: true,
+          autoIncrement: true
+        },
+        userId: {
+          type: DataTypes.STRING,
+          allowNull: false
+        },
+        bookId: {
+          type: DataTypes.STRING,
+          allowNull: false
+        },
+        rating: {
+          type: DataTypes.FLOAT,
+          allowNull: false
+        }
+      },
+      {
+        sequelize,
+        modelName: 'userBookExplicitRating',
+        tableName: 'userBookExplicitRatings',
+        indexes: [
+          {
+            unique: true,
+            fields: ['userId', 'bookId']
+          }
+        ]
+      }
+    )
+
+    const { user, book } = sequelize.models
+
+    user.hasMany(UserBookExplicitRating, {
+      foreignKey: 'userId'
+    })
+
+    this.belongsTo(user, { foreignKey: 'userId' })
+
+    book.hasMany(this, {
+      foreignKey: 'bookId'
+    })
+
+    this.belongsTo(book, { foreignKey: 'bookId' })
+  }
+}
+
+module.exports = UserBookExplicitRating